한국초전도저온공학회:학술대회논문집 (Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference)
- 한국초전도저온공학회 2003년도 추계학술대회 논문집
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- Pages.142-145
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- 2003
Bi-2223/Ag 고온초전도선재의 Jc와 미세조직에 미는 저온압연의 영향
The effect of cryogenic rolling on critical current density of Bi-2223/Ag HTS tapes
초록
In order to investigate the effect of cryogenic rolling on the critical current density (Jc), 54 and 55-multi-filament Bi-2223/hg tapes have been fabricated using a PIT process including two different types of cooling methods. The densification of oxide filament was found to occur due to the cryogenic rolling, and this enhanced the critical current density. However, when the wire was fully immersed in liquid nitrogen used as the coolant in cryogenic rolling, Jc degradation appeared caused by the nitrogen penetration into the filament. The cryogenically rolled tape with an improved type of cooling showed approximately 10% Jc's increase.
키워드